The S2P helper app ‘adds’ extra new blocks into the Scratch software. These new blocks automatically appear when you simply open the template Scratch (.sb2) file. These extra blocks enable you to control outputs (e.g. through the motor block) or detect changes in real-life inputs via new ‘reporter blocks’. - See more at: http://www.picaxe.com/Software/Third-Party/Scratch/#sthash.ucMQoQLD.dpuf